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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_asio.reference.execution__set_done"></a><a class="link" href="execution__set_done.html" title="execution::set_done">execution::set_done</a>
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<p>
        <a class="indexterm" name="boost_asio.indexterm.execution__set_done"></a> 
A customisation
        point that delivers a done notification to a receiver.
      </p>
<pre class="programlisting">constexpr unspecified set_done = unspecified;
</pre>
<p>
        The name <code class="computeroutput">execution::set_done</code> denotes a customisation point object.
        The expression <code class="computeroutput">execution::set_done(R)</code> for some subexpression
        <code class="computeroutput">R</code> is expression-equivalent to:
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            <code class="computeroutput">R.set_done()</code>, if that expression is valid. If the function
            selected does not signal the receiver <code class="computeroutput">R</code>'s done channel,
            the program is ill-formed with no diagnostic required.
          </li>
<li class="listitem">
            Otherwise, <code class="computeroutput">set_done(R)</code>, if that expression is valid, with
            overload resolution performed in a context that includes the declaration
            <code class="computeroutput">void set_done();</code> and that does not include a declaration
            of <code class="computeroutput">execution::set_done</code>. If the function selected by overload
            resolution does not signal the receiver <code class="computeroutput">R</code>'s done channel,
            the program is ill-formed with no diagnostic required.
          </li>
<li class="listitem">
            Otherwise, <code class="computeroutput">execution::set_done(R)</code> is ill-formed.
          </li>
</ul></div>
<h5>
<a name="boost_asio.reference.execution__set_done.h0"></a>
        <span class="phrase"><a name="boost_asio.reference.execution__set_done.requirements"></a></span><a class="link" href="execution__set_done.html#boost_asio.reference.execution__set_done.requirements">Requirements</a>
      </h5>
<p>
        <span class="emphasis"><em>Header: </em></span><code class="literal">boost/asio/execution/set_done.hpp</code>
      </p>
<p>
        <span class="emphasis"><em>Convenience header: </em></span><code class="literal">boost/asio/execution.hpp</code>
      </p>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2021 Christopher
      M. Kohlhoff<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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